<title>「NOIP2016」愤怒的小鸟</title><link href="http://hzoi.com/tomorrow.css" rel="stylesheet"><div class="ui existing segment"><pre><code><span class="pl-cp">#include</span> <span class="pl-cpf">&lt;algorithm&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;cmath&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;cstdio&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;cstring&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;iostream&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#define inf 1e15</span>
<span class="pl-cp">#define eps 1e-8</span>
<span class="pl-k">using</span> <span class="pl-k">namespace</span> <span class="pl-n">std</span><span class="pl-p">;</span>
<span class="pl-k">typedef</span> <span class="pl-kt">long</span> <span class="pl-kt">long</span> <span class="pl-n">ll</span><span class="pl-p">;</span>
<span class="pl-n">ll</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">m</span><span class="pl-p">;</span>
<span class="pl-kt">double</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-mi">20</span><span class="pl-p">],</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-mi">20</span><span class="pl-p">];</span>
<span class="pl-n">ll</span> <span class="pl-n">dp</span><span class="pl-p">[(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-mi">20</span><span class="pl-p">)],</span> <span class="pl-n">p</span><span class="pl-p">[</span><span class="pl-mi">20</span><span class="pl-p">][</span><span class="pl-mi">20</span><span class="pl-p">];</span>
<span class="pl-kt">double</span> <span class="pl-nf">d</span><span class="pl-p">(</span><span class="pl-kt">double</span> <span class="pl-n">num</span><span class="pl-p">)</span> <span class="pl-p">{</span> <span class="pl-k">return</span> <span class="pl-n">num</span> <span class="pl-o">*</span> <span class="pl-n">num</span><span class="pl-p">;</span> <span class="pl-p">}</span>
<span class="pl-kt">int</span> <span class="pl-nf">main</span><span class="pl-p">()</span> <span class="pl-p">{</span>
    <span class="pl-n">ll</span> <span class="pl-n">T</span><span class="pl-p">;</span>
    <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%lld&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">T</span><span class="pl-p">);</span>
    <span class="pl-k">while</span> <span class="pl-p">(</span><span class="pl-n">T</span><span class="pl-o">--</span><span class="pl-p">)</span> <span class="pl-p">{</span>
        <span class="pl-n">memset</span><span class="pl-p">(</span><span class="pl-n">p</span><span class="pl-p">,</span> <span class="pl-mi">0</span><span class="pl-p">,</span> <span class="pl-k">sizeof</span><span class="pl-p">(</span><span class="pl-n">p</span><span class="pl-p">));</span>
        <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%lld%lld&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">m</span><span class="pl-p">);</span>
        <span class="pl-kt">double</span> <span class="pl-n">a</span><span class="pl-p">,</span> <span class="pl-n">b</span><span class="pl-p">;</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%lf%lf&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">],</span> <span class="pl-o">&amp;</span><span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]);</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
            <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
                <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">!=</span> <span class="pl-n">j</span><span class="pl-p">)</span> <span class="pl-p">{</span>
                    <span class="pl-n">a</span> <span class="pl-o">=</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">-</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">])</span> <span class="pl-o">/</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">-</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]));</span>
                    <span class="pl-n">b</span> <span class="pl-o">=</span> <span class="pl-p">(</span><span class="pl-n">d</span><span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">])</span> <span class="pl-o">*</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">-</span> <span class="pl-n">d</span><span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">])</span> <span class="pl-o">*</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">])</span> <span class="pl-o">/</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">*</span> <span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">-</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]));</span>
                    <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">a</span> <span class="pl-o">&lt;=</span> <span class="pl-o">-</span><span class="pl-n">eps</span><span class="pl-p">)</span>
                        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">k</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">k</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">k</span><span class="pl-o">++</span><span class="pl-p">)</span>
                            <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">fabs</span><span class="pl-p">(</span><span class="pl-n">a</span> <span class="pl-o">*</span> <span class="pl-n">d</span><span class="pl-p">(</span><span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">k</span><span class="pl-p">])</span> <span class="pl-o">+</span> <span class="pl-n">b</span> <span class="pl-o">*</span> <span class="pl-n">x</span><span class="pl-p">[</span><span class="pl-n">k</span><span class="pl-p">]</span> <span class="pl-o">-</span> <span class="pl-n">y</span><span class="pl-p">[</span><span class="pl-n">k</span><span class="pl-p">])</span> <span class="pl-o">&lt;=</span> <span class="pl-n">eps</span><span class="pl-p">)</span>
                                <span class="pl-n">p</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">][</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">|=</span> <span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">k</span><span class="pl-p">;</span>
                <span class="pl-p">}</span>
            <span class="pl-p">}</span>
        <span class="pl-p">}</span>
        <span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-mi">0</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
        <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-p">(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">n</span><span class="pl-p">);</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
            <span class="pl-n">ll</span> <span class="pl-n">j</span><span class="pl-p">;</span>
            <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">j</span><span class="pl-o">++</span><span class="pl-p">)</span>
                <span class="pl-k">if</span> <span class="pl-p">((</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">j</span><span class="pl-p">)</span> <span class="pl-o">&amp;</span> <span class="pl-n">i</span><span class="pl-p">)</span> <span class="pl-k">break</span><span class="pl-p">;</span>
            <span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-n">i</span> <span class="pl-o">^</span> <span class="pl-p">(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">j</span><span class="pl-p">)]</span> <span class="pl-o">+</span> <span class="pl-mi">1</span><span class="pl-p">;</span>
            <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-n">ll</span> <span class="pl-n">k</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">k</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">k</span><span class="pl-o">++</span><span class="pl-p">)</span>
                <span class="pl-k">if</span> <span class="pl-p">(</span><span class="pl-n">k</span> <span class="pl-o">!=</span> <span class="pl-n">j</span> <span class="pl-o">&amp;&amp;</span> <span class="pl-p">(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">k</span><span class="pl-p">)</span> <span class="pl-o">&amp;</span> <span class="pl-n">i</span><span class="pl-p">)</span>
                    <span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">min</span><span class="pl-p">(</span><span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">],</span> <span class="pl-n">dp</span><span class="pl-p">[</span><span class="pl-n">i</span> <span class="pl-o">^</span> <span class="pl-p">(</span><span class="pl-n">i</span> <span class="pl-o">&amp;</span> <span class="pl-n">p</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">][</span><span class="pl-n">k</span><span class="pl-p">])]</span> <span class="pl-o">+</span> <span class="pl-mi">1</span><span class="pl-p">);</span>
        <span class="pl-p">}</span>
        <span class="pl-n">printf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d</span><span class="pl-se">\n</span><span class="pl-s">&quot;</span><span class="pl-p">,</span> <span class="pl-n">dp</span><span class="pl-p">[(</span><span class="pl-mi">1</span> <span class="pl-o">&lt;&lt;</span> <span class="pl-n">n</span><span class="pl-p">)</span> <span class="pl-o">-</span> <span class="pl-mi">1</span><span class="pl-p">]);</span>
    <span class="pl-p">}</span>

    <span class="pl-k">return</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
<span class="pl-p">}</span>
</cpde></pre></div>